Updated dense output evaluation routine -- there was a bug in the second-order interpolant, so I updated all interpolants to use a revised formulation.
Updated dense output evaluation routine -- there was a bug in the second-order interpolant, so I updated all interpolants to use a revised formulation.

liuqx315/Sundials,liuqx315/Sundials,liuqx315/Sundials,liuqx315/Sundials,liuqx315/Sundials,liuqx315/Sundials